On 19.02.2025 17:04, Petr Beneš wrote: > Hello, > > I have a script that's supposed to start a couple of (Windows 10) VMs > in parallel, wait until they boot and connect to the network, and then > create a live snapshot. > > VMs are created by simple "xl create vm.cfg" and the live snapshot is > created by "xl save win10-18362-NNN path/to/state". > > I have noticed, that "xl create" occasionally throws this line: > ``` > libxl: error: libxl_aoutils.c:646:libxl__kill_xs_path: qemu > command-line probe already exited > ``` > > First I thought it's related to the fact that multiple "xl create" > commands are being run in parallel, but to my surprise, this line > sometimes occurs even for standalone "xl create" commands. > > However, when "xl save" is being executed in parallel, I'm very often > met with output similar to this: > ``` > Saving to win10-18362-102/state new xl format (info 0x3/0x0/1780) > xc: info: Saving domain 193, type x86 HVM > Saving to win10-18362-101/state new xl format (info 0x3/0x0/1780) > xc: info: Saving domain 192, type x86 HVM > Saving to win10-18362-104/state new xl format (info 0x3/0x0/1780) > xc: info: Saving domain 194, type x86 HVM > xc: error: save callback suspend() failed: 0: Internal error > xc: error: Save failed (0 = Success): Internal error > libxl: error: libxl_stream_write.c:347:libxl__xc_domain_save_done: > Domain 192:saving domain: domain responded to suspend request: Success > Failed to save domain, resuming domain > xc: error: save callback suspend() failed: 0: Internal error > xc: error: Save failed (0 = Success): Internal error > xc: error: Dom 192 not suspended: (shutdown 4, reason 3): Internal error > libxl: error: libxl_dom_suspend.c:661:domain_resume_done: Domain > 192:xc_domain_resume failed: Invalid argument > libxl: error: libxl_stream_write.c:347:libxl__xc_domain_save_done: > Domain 194:saving domain: domain responded to suspend request: Success > Failed to save domain, resuming domain > xc: error: Dom 194 not suspended: (shutdown 4, reason 3): Internal error > libxl: error: libxl_dom_suspend.c:661:domain_resume_done: Domain > 194:xc_domain_resume failed: Invalid argument > xc: Frames: 1044480/1044480 100%: Frames: 52224/1044480 5% > ```
Just one thing - to (hopefully) get a better understanding of the origin of those errors, you may want to increase verbosity of the "xl save", e.g. "xl -vvv save". Jan
